Regarding UCI, their biology department is excellent, I am sure BC would also provide a great science education for you. My concern would be the cost difference, can you afford the increased cost of BC? Average med school loans are $180,000, it would be nice to minimize the cost of undergrad.
On the other hand, it will be more difficult to connect with professors at UCs, there are such large classes, it takes a lot of effort to connect with the Prof. A private school can afford you easier connections with the professors.
If you get into Berkeley, the science education is quite similar in the information covered, but truly the reputation goes far, especially out of state and many CA med school applicants go out of state.